This is how many calories are in your Christmas dinner — and how long it would take you to work it off

Seasonal treats, tipples, and second helpings rack up over 5,300 calories on Christmas day.Flickr/Nick Bramhall

73% of Brits don't think about their calorie intake over the festive period.

During Christmas dinner, we consume over 5,200 calories — and a whopping 190g of fat.

You'd have to run two marathons, or 52 miles, to burn this off.

If you ate this way every day, you'd be 308 pounds heavier by this time next year.

Christmas is the one time of year when many of us allow ourselves to splurge on tipples and treats without feeling guilty.

With chocolate selection boxes, bubbly, and mince pies aplenty, we tend to go a little overboard "just because it's Christmas."

According to a survey by manufacturer Wren Kitchens, almost three-quarters of Brits try not to think about their escalating calorie counts as they indulge in seasonal treats. 60% of the 2,000 respondents in the report even went as far as saying that they consider Christmas their "get out of jail free" card and gorge on whatever they please.

Christmas parties, limited edition hot drinks, and seasonal sandwiches have us splurging on a daily basis throughout December — and that's before we even get to the Christmas dinner

The nutrition supplement company jotted up the calorie count of a typical Christmas day affair, including champagne and nibbles, a smoked salmon starter, a roast turkey dinner with wine, and dessert and a cheeseboard.

1,327 calories of alcohol, 1,290 on treats and pudding, and 496 on a starter or appetiser contribute towards the mammoth total count — all before the 2,128 calories consumed during the Christmas roast itself.

Nearly a day's worth of calories are consumed before it even gets to lunchtime, with bucks fizz, chocolate, and treats from the stocking often making up the Christmas breakfast.

After the Christmas lunch, more treats, desserts, tipples, and a cheese board take us into the evening as we reach to unbutton our flies.

This prolonged feasting means that the average woman consumes almost three times her recommended calorie intake — and the average man more than doubles his 2,500 calorie guideline.

And so much gorging doesn't come without its downside (although we may like to pretend that our Christmas grazing has no consequences). Those who indulge in a day of treats and second helpings would have to run the equivalent of two marathons, swim for 13 hours straight, or cycle over 109 miles (175 km) to work off their festive feast.

If this doesn't sound feasible, it's probably because it isn't. On average, it takes four months to repair the damage done by a seasonal splurge, with many dieters only returning to their pre-Christmas weight in time for Easter.

Zuzanna Sobocinska ANutr, a registered associate nutritionist advised that "introducing a healthy, balanced diet along with regular exercise straight after Christmas is a recommended way to reverse Christmas Day's indulgence."